Debian Bug report logs - #405223
linux-image-2.6.18-3-xen-vserver-686: "4gb seg fixup" messages

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Message #5 received at submit@bugs.debian.org (full text, mbox):

From: Vagrant Cascadian <vagrant+bugs@freegeek.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: linux-image-2.6.18-3-xen-vserver-686: "4gb seg fixup" messages
Date: Mon, 1 Jan 2007 15:28:51 -0800

Package: linux-image-2.6.18-3-xen-vserver-686
Version: 2.6.18-8
Severity: normal

my syslog is getting flooded with messages like this:

4gb seg fixup, process bash (pid 4760), cs:ip 73:b7e062a5
printk: 2830 messages suppressed.

this doesn't happen when running non-xen kernels.

live well,
  vagrant

-- System Information:
Debian Release: 4.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-3-xen-vserver-686
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages linux-image-2.6.18-3-xen-vserver-686 depends on:
ii  initramfs-tools               0.85e      tools for generating an initramfs
ii  linux-modules-2.6.18-3-xen-vs 2.6.18-8   Linux 2.6.18 modules on PPro/Celer

Versions of packages linux-image-2.6.18-3-xen-vserver-686 recommends:
ii  libc6-xen                    2.3.6.ds1-8 GNU C Library: Shared libraries [X

-- no debconf information

Message #10 received at 405223@bugs.debian.org (full text, mbox):

From: Tony Lewis <gnutered@yahoo.com.au>
To: 405223@bugs.debian.org
Subject: a workaround
Date: Thu, 08 Feb 2007 15:07:45 +1100

You may want to look at 
http://wiki.xensource.com/xenwiki/DebianTlsLibcDiversion.

But note also that you'll want to relocate all the /lib/tls directories 
in your vserver guests too.

Here's how I do it:

   $ for d in /lib/tls /vservers/*/lib/tls; do [ -d $d ] && echo sudo 
mv $d $d.`date +%Y%m%d`; done

Then cut and paste the resulting commands

Note that you need to do this after *every* upgrade to libc, and that 
you might also need to restart any application that was using the old 
libraries.  And you need to do it after creating every new vserver guest.

If all your vserver guests are etch-based, then you can probably install 
the libc6-xen package, and see if that solves the problem.  I have 
dapper guests mainly, and a Xen-friendly libc6 package doesn't exist, so 
I don't know if this will fix it for you.

Tony

Message #17 received at 405223@bugs.debian.org (full text, mbox):

From: Matt Sayler <sayler@thewalrus.org>
To: 405223@bugs.debian.org
Subject: me too..
Date: Mon, 16 Apr 2007 14:54:00 -0400

FWIW, I'm seeing this on a newly installed etch box, only for the  
vserver guests, and regardless of whtther the guests are running etch 
+libc6-xen or not.

Should installing libc6-xen automatically solve the problem?  Do I  
need to uninstall the other libc6?

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